<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 - 页面不存在</title>
    <link rel="stylesheet" href="https://unpkg.com/element-plus@2.2.22/dist/index.css">
    <style>
        body {
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            min-height: 100vh;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #333;
        }
        
        .container {
            text-align: center;
            background: white;
            border-radius: 16px;
            padding: 80px 50px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
            max-width: 500px;
            width: 90%;
            position: relative;
            overflow: hidden;
        }
        
        .container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 5px;
            background: linear-gradient(90deg, #667eea, #764ba2);
        }
        
        .error-code {
            font-size: 120px;
            font-weight: 800;
            margin: 0;
            line-height: 1;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .error-message {
            font-size: 24px;
            margin: 30px 0;
            color: #606266;
            font-weight: 500;
        }
        
        .description {
            font-size: 16px;
            color: #909399;
            margin: 0 0 40px;
            line-height: 1.6;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 32px;
            font-size: 16px;
            font-weight: 500;
            color: white;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border: none;
            border-radius: 8px;
            cursor: pointer;
            text-decoration: none;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
        }
        
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
        }
        
        .btn:active {
            transform: translateY(0);
        }
        
        @media (max-width: 768px) {
            .container {
                padding: 60px 30px;
            }
            
            .error-code {
                font-size: 80px;
            }
            
            .error-message {
                font-size: 20px;
            }
            
            .description {
                font-size: 14px;
            }
        }
        
        @media (max-width: 480px) {
            .container {
                padding: 40px 20px;
                margin: 20px;
            }
            
            .error-code {
                font-size: 60px;
            }
            
            .error-message {
                font-size: 18px;
            }
            
            .btn {
                width: 100%;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <h1 class="error-code">404</h1>
        <p class="error-message">抱歉，您访问的页面不存在</p>
        <p class="description">您可能输入了错误的地址，或者该页面已被移除。请检查URL是否正确。</p>
        <a href="/" class="btn">
            <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" style="margin-right: 8px;">
                <path d="m3 9 9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z"></path>
                <polyline points="9 22 9 12 15 12 15 22"></polyline>
            </svg>
            返回首页
        </a>
    </div>
</body>
</html>